Originally Posted by jamesling1964
My HTC One M7 is experiencing this issue reported recently for Telstra Australia users. How do you clear the data for the phone app?
To clear the data for the phone app (or any other except Google Play Services)...
Scroll right to the All tab
Scroll down until you find the app you want, or tap the magnifying glass and enter the name (e.g. "Phone")
Tap on the App name
Tap Clear Data
For Google Play Services, after tapping on the App name, tap the Manage Space button, then Clear All Data button.
Folks have recommended clearing data for Phone, Google Play Services, Google Play Store, Google Services Framework. These are all harmless (you might be re-asked for some permissions). But my testing shows that it is a temporary fix, likely because the Google apps reload the offending bug. I suspect we'll have to wait for a fix from HTC or Google.
Clearing Cache or data is often a good way to sort Android app problems, but bear in mind that any local data relating to the app will be lost, such as accounts/logons, media, high scores etc. so progress with caution and use your backups first.